Boring machine



Feb, @M1923 LM599L I Jn Al BORING MACHINE.

FILED DEC. 5, 1921- I 2 -SHEETS-SHEET 2.

l/w/E/vro JA, Makaay,

To all (colto/m, t may concern rasata renne, maa.

.W i all! .renin arrasar nii-icm?, or nan'sas'orrv, Kansas;

nomme ni-icnrnn application filed IDeeember 5, `1921. Serial No.` 520,048. i

Be `it known that l, Joran Ault/frieren `a citizen of the United States, and resident of Kansas City, in the county of lltlyandotte and State` of Kansas, .have invented certain new and i useful improvements in loringy Machineaof which the following is a specilisation. l i

Ulli

rllhis invention relatestc boring machines especially adapted for use in reboringcyl- `inders of engines.

\ An important objectloflthis invention is to provide a portable boring machine for engine cylinders, having a plurality of ra `dia-ily arranged cutters adapted .to uniformly `engage the wall of the cylinder so H aste rebore the saine and `which 'will not yield as a result of encountering hard spots 1 inthe Wall of the cylinder and which Will not makea deeper cut than desired Whenia lsoft place in the cylinder Wall; is, encoun- Jtered 3 Another object of theinvention is to provide a cylinder boring machine having slm- Ipleiineans whereby the saine may be `readily "and conveniently attached to a cylinder upon the` removal. of the cylinder' `head and which be conveniently adjusted for operation.`

` Further thel invention forming the sub-i` `jectniatter of this application aims to pro-` i vide` a cylinder boring machine having novel means whereby the `cutters are caused `to feed as the cutters rotate. v d

\ A further `object oftheinvention `is to provide a boring machine for cylinders which `is of highly simplified construction, durable in `use land cheapto manufacture.

Otherobjects and advantages of the .invention Will be apparent during the course of the following description.

` lin the accompanying drawings forming a part of this application and in which like numerals are employed to designate like "parts throughout the same,

Figure 1 is a side elevation of the improved boring machine applied, parts being shown in section. i

Figure 2 is a horizontal sectional View taken Online 2-p-2 of Figure 1.

' Figure 3 is a perspective of a feed embodied in the invention.

Figure l is aside elevation of the improved boring machine, the View being taken at right angles to Figure 1.

` Figure 5 is a bottom plan view of theini nut i proved boring machine, the clamp4 for the.'

same being shown applied.

Figure/6` is a,,horizontalwsectional view taken on line 6 6` of Figure 1. y y

"Figure 7 `is a perspective,` of a clamp embodied in theinvention. y

ln the drawingsthe `numeral` generally4 designates a frame `Which consists of a disk is rotatably extended through the upper and i lowerbearings 10 and 11 and hasits `lower i, end formed With a "disk-shaped head 16 provided with radial sockets which receive critter blades 17 adjustably held in position by means of set screws 18. i

When preparing theimachine `for opera? tion the .cutters `17 of which there `may be four or more are adjusted by means ofa pair of calipers and by reason of the fact that the blades are oppositely arranged the same may be accurately adjusted with a minimum i of effort on the part of the operator.

The feed shaft 15 is rota-ted by means of a` bevel gear 2,0 mounted on the shaft and having a radially arranged` key 21 slidable in a' longitudinal key-Way 22in the barl 15 sothat when the bevel gear 20 is rotated the feed bar 15 Will also be rotated. The

bevel gear'20 is engaged by a pinion 26 having a shaft 27 to which a spur gear 28 may be operatively connected. A smaller spur gear 29 may be engaged with the spur gear E28-and operated by a hand crank 30. The spur gear 29 is rotatably mounted upon a stub-shaft 32 lsecured .in the side of the standard S at a point above and in spaced relation to the shaft 27.` rlhis arrangement of gearing, ishowever, employed only when a deep cut is to be made and when a cut of the average depth is made the crank 30 may be connected directly to the shaft 27.

The feed bar is advanced by means of a feed nut 38 seated in a cone-shaped recess formed in the laterally projecting bearing 39 formed at the upper end of the standard 8, The feed nut 38 is `interiorly screw threaded and; receives the threaded |portionof thebarfl. As illustratedin Figure 3y the feed nut 38 is tapered so that it-will fit accurately7 Within the tapered-recess inr the bearing member 39 whereby the feed bar will at all times be in alignment withf the axis of the cylinder 7. The feed nut 38 is detachably held in position bymeans of a latch lmember 42 pivoted at its forward end to"th'e'b'earinz`grv 39"'as indicatedwat 44:. The intermediatey portion of theA latch member 42' is providedwith a` socket which receives the feed bar l5 and the adjacent portion of thelatchI contactswiththe top'of the feed nuti and holds the same against upward movementh When the feed bar reaches the limitof lits forward movementjthe latch is lswung' to itsinoperative; position andthe vfeed nut and shaft elevated 'and thev nut returned-Ito its original position.` Vhen the feed nut'38has been returnedto its original position;A the; cutting Voperation may beA re-` sumed.

BXcmpIOying; a plurality j of radially arranged cutters as illustrated 1n Figurev l thefeed bar 'l5 andconsequently the cutters lwill lnot yield when a hard place in the cylinder wall is encountered. Furthermore,

the base -G andl a convenient place on the cylinder; Thumb screws 63gand' 64 are threaded through the clamp and form a means forholding the clamp andthe base iimly inposition.

As illustrated in 'Fig'. 2, lthe combined centering and feednut 38 is securely held within `the tapered opening in the bearing 39 by means of the 1atch'47 and the nut is provided, with anupstandingpinv(i7 which engages the latch and thereby limits the ro tationA of the nut.

Having thus described my invention what is claimed is l. A boring machine for cylinders coniprisinpa base havingl means whereby the saine may be detachably connected to a cylinder, said base being provided with an npstandingr standard Ahaving laterally projecting aligned bearings, a feed bar rotatably extended through said bearings and havin;r ahead, cutting' devices carried by said head. the rear portion of said feed bar being; threaded, the upper portion of said standard being provided with a laterally projectinur bearing having a tapered recess, a eoinbinrd centering' and feed nut of tapered formation received in Said recess and receiving the threaded portion of said feed bar, said taperel feed nut being detachably arranged in said recess` and a latch pivoted to said second named bearing and adapted to engage said-feed nut to hold the same in position.

2. A cylinder boring machine comprising a base adapted to be firmly secured to a cyl inder and having' a standard provided with apair of spaced bea'lrings adjacent its lower portion, a feed bar rotatably through said 'bearings and havingl its forward portion provided with cutting devices. the upper portion of said standard being provided with a laterally projecting bearing' havingatapered opening'. a combined feed and centering nut received in said tapered opening7 the rear portion of said feed bar being; threaded for engagement with said tapered nut, means to hold said nut in said tapered recess, a gear connected to said shaft between said pair of bearings. a second gear connected to said first named gear and having a shaft rotatably exteinfled through said standard, and means connected to said shaft whereby the same may be rotated.

JOH N ALBERT M ACEY.

extended 

